The store assistant and niece of Shin Niita who owns Card Capital. She is a calm quiet girl who does not speak much but is known for her strong temper especially when around Morikawa.

In season 2 Misaki will be taking part in Asia Circuit and will travel around Asia to fight different fighters, along with the rest of Team Q4. She seems to have problems in the first circuit as she could not handle against the new skill - Limit Break.

In season 3 Misaki is now a second year at Miyaji Academy in which Aichi also attends. She also cut her hair to shoulder-length, but otherwise appears to be the same. She also changed her deck from Oracle Think Tank to Genesis in response to experimenting with her skills.

She is a Vanguard player who is known to have the Indelible Memory which allows her to perfectly remember everything she sees using this ability to memorize the rules after reading them once and all the cards and card effects in past matches at Card Capital. She uses an Oracle Deck based on Greek & Japanese Mythology which also uses powerful card effects to give her an advantage over her opponents. Her strongest card is CEO Ameterasu.